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- The last part of the bowel (rectum) becomes full of poo
- It becomes so used to being full that it does not send strong
enough signals to the brain that you need to go to the toilet
- New poo joins from the top all the time and the rectum gets fuller
and fuller
- Some of the new poo will be runny and can leak out and stain
your pants
- The rectum gets so full that it pushes open and a big quantity
of poo can come out in a rush
- Some of the old poo can be left behind and the whole cycle
starts again
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